hi.. It's been awhile since the last time with rexx and i'm getting some logic trouble to put one stem into another one. Basically i'm trying to group 4 lines from old stem into 1 line on the new one. Any help is welcome! Thanks !

Your example would be better if the OLD stem had different values so we could see where they came from and where you want them.

1. you want a loop to process all of the OLD stem
2. within the loop, you need assignment statements for the NEW stem
3. concatenate the OLD stem values to whatever is in NEW stem
4. increment the index for the NEW stem every four times.